Etude ultrastructurale du paraplacenta de chatte: m�canisme de l'�rythrophagocytose par la cellule chorionique

Malassiné, André

doi:10.1007/bf00318930

Cited by 14 publications

(5 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Large numbers of electron-lucent lipid droplets fill the basal cytoplasm, the nuclei have moved to the apical cell region, and only a few dark erythrocyte fragments remain. Note on the elaborate lateral borders of these cells, x 3,750. see also Malassiné, 1977]. The apical ends of the trophoblast cells display numerous microvilli.…”

Section: Trophoblastmentioning

confidence: 99%

“…Only during the storage phase can iron deposits be observed in the basal lamina underlying the trophoblast (and yolk sac) of the cat [ Wislocki and Dempsey, 1946 ;Dempsey and Wislocki, 1956;Malassiné, 1977] and other species [Salazar and Gonzales-Angulo, 1967;Enders and Wimsatt. 1968 ;Enders and Enders, 1969 ;Sinha and Erickson, 1974;King and Tihhitts, 1976].…”

Section: Erythrophagocytosis In Relation To Maternal-fetal Iron Transfermentioning

confidence: 99%

“…Darkening of the red blood cell interior had taken place in stage 2, possibly due either to concentration of hemoglobin or better penetration of O s0 4 through the cell membrane. In addition, more binding sites for O s04 might become available with increased hemoglobin breakdown \Bahr, 1955;Karlson, 1974], Gulamhusein and Beck [1975], have shown acid phosphatase in phagolysosomes of the ferret as has Malassiné [1976Malassiné [ , 1977 by an additional analogic reaction with phosphotungstic acid in the cat. During stage 3, the dark cell material passes into the peripheral zone of the phagosome, presumably due to increas ing breakdown of the erythrocyte mem brane.…”

Section: Erythrophagocytosis In Relation To Maternal-fetal Iron Transfermentioning

confidence: 99%

“…This procedure [Malassiné, 1977] may be preceded by a change of surface charge on erythrocytes resulting in an irreversible adherence [Marikovsky and Danon, 1969;Spors, 1970], Lutz et al [1977], studying in vitro aging of human red Fig. 18.…”

Section: Erythrophagocytosis In Relation To Maternal-fetal Iron Transfermentioning

confidence: 99%

“…1944: Amoroso, 1952Wimsatt. 1962], The ultrastructure of hematomal areas has been the focus of only a few studies, in the shrew [King et al, 1978], the sheep | Myagkaya and Vreeling-Sindelarova, 1976;Barton et al, 1976], the seal \Sinha and Erickson, 1974], the ferret (Gulamhusein and Beck, 1975] and in the cat [Dempsey and Wislocki, 1956;Malassiné, 1977]. This study focuses on the evidence for maternalfetal iron transfer in the cat marginal hematoma.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Light- and electron-microscopic study of the near-term paraplacenta of the domestic cat

Leiser¹,

Enders²

1980

Cells Tissues Organs

View full text Add to dashboard Cite

In the near-term paraplacental extravasate zone of the domestic cat, which includes paraplacental junctional areas and marginal hematomas, the uterine epithelium becomes highly proliferative, especially on the folds or protrusions. This hyperplastic surface and the adjacent connective tissue become symplasmic, degenerate and eroded, eventually resulting in maternal vascular breakdown. The uterine lumen thus contains maternal blood in addition to sloughed uterine cells. The adjacent cytotrophoblast apparently phagocytoses and ingests this material. Various stages of phagolysosomes containing erythrocytes of variable density are seen in these cells, as are myelin-like structures, ferritin, glycogen and lipid droplets. Crystalloid iron deposits are seen in the basal lamina and connective tissue subjacent to the hemophagous cytotrophoblast.

show abstract

Section: Trophoblastmentioning

confidence: 99%

Section: Erythrophagocytosis In Relation To Maternal-fetal Iron Transfermentioning

confidence: 99%

Section: Erythrophagocytosis In Relation To Maternal-fetal Iron Transfermentioning

confidence: 99%

Section: Erythrophagocytosis In Relation To Maternal-fetal Iron Transfermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Light- and electron-microscopic study of the near-term paraplacenta of the domestic cat

Leiser¹,

Enders²

1980

Cells Tissues Organs

View full text Add to dashboard Cite

show abstract

Comparative Placentation

Telugu¹,

Green²

2007

Comparative Reproductive Biology

View full text Add to dashboard Cite

Developmental changes in the fine structure of the chorion laeve (Smooth chorion) of the rhesus monkey placenta

King

1981

Anat. Rec.

View full text Add to dashboard Cite

Developmental changes in the fine structure of the chorion laeve (smooth chorion) of the rhesus monkey were studied at two time periods during gestation: 1) Early (19-60 days of gestation), before the chorionic epithelium fuses with the parietal decidua, and 2) near term, when the fused chorioamnion has also fused with the parietal decidua. Early in gestation the chorionic epithelium consisted of columnar and cuboidal cells one or two layers thick. The apical border of the cells had microvilli and coated pits, and adjacent cells were joined by tight junctions and desmosomes. The chorionic epithelial cells during this early period contained numerous large vesicles and vacuoles of varying electron-density. The apical cytoplasm contained various small coated vesicles and tubules. Taken together these observations were interpreted as indicating a possible role for these cells in endocytosis or phagocytosis of substances from the uterine lumen; i.e., a potential role in histiotrophic nutrition during this early period. Late in gestation the trophoblastic cells were more irregular in shape. The cells contained abundant granular endoplasmic reticulum (ER) and mitochondria, and a well-developed Golgi complex, suggesting the cells were actively synthetic late in gestation. The numerous cytoplasmic vacuoles characteristic of the trophoblastic cells of early gestation were absent near term. Glycogen deposits and lipid droplets were moderately well-developed near term. Most of the cells were joined by desmosomes but wide intercellular spaces, unobstructed by any cell junctions, were frequently observed. This observation provides at least one explanation for the increase in permeability of the chorion laeve later in gestation. Cells of the parietal decidua associated with the chorion laeve were also examined. These cells generally had a well-developed granular ER and Golgi apparatus, and numerous mitochondria. Limited numbers of membrane-bounded secretory bodies, similar to those in human decidual cells, were also present.

show abstract

Etude ultrastructurale du paraplacenta de chatte: m�canisme de l'�rythrophagocytose par la cellule chorionique

Cited by 14 publications

References 37 publications

Light- and electron-microscopic study of the near-term paraplacenta of the domestic cat

Light- and electron-microscopic study of the near-term paraplacenta of the domestic cat

Comparative Placentation

Developmental changes in the fine structure of the chorion laeve (Smooth chorion) of the rhesus monkey placenta

Contact Info

Product

Resources

About